Water-paint.



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1 UNITED STATES PATENT' Patented. July 7, 1903.

SAMUEL S. RUSTON AND BENJAMIN RUSTON, OF SYRACUSE, NEW YORK.

ATEu- AiNT.

SPEGIFIGATION forming part of Letters Patent No. 732,894, dated July 7, 1903. Application filed June 9,1902. Bariel Ila-110.760. N specimens.)

To all whom it iii/ by concern;

Be it known that we, SAMUEL S. R-L'siON and BENJAMlN ltusron, of Syracuse, in the county of Onondaga in the State of New Y ork, have invented new and useful Improvements in the Composition in \Vater-Paints and Methods of Producing" the Same, of which the following is a full, clear, and exact description.

' This invention relates to improvements in the composition in water-paints and method of producing the same.

Our object is to produce such a composition which may be used for either indoor or outdoor Work, cheap and durable, and the further object of producing the same by an inexpensive method. p

Our invention consists in the several ingredients hereinafter specified mixed and commingled togelher by a process and method herein'ai'ler set forth, and to that end our in vcn-tion. consists in combining the several ingredients hereinafter specified and in the sevoral new and novel steps constitnting, our

process hereinafter described, and which are set forth in the claims hereunto annexed.

, We have found by experiments that by combining common cheese-curd,w(.st or dricdpvith oil or fat in an intimately and finely-divided state such composition being mixed with an alkaline solvent and mixed up with water produces a tough waterproof film] We mix this composition with lime slaked with a solution ofalumina sulfate and have as aresult a coinposition which when mixed with water forms on drying 0 ur wai or wool-paint ad hesi ve mixture, w-hichis adapted for sizing, wall-coatlug, 85c.

The following: are substantially the propertions used to produce our composition, although We do not 1 bolt oursel vesto these exact amount: as they may be varied according to the use to which the composition islo be put. 0rdinarily,howc\ (ii-,wccouibineii l'typercent.

of casein with an equal amount of hydrocarbon substances, such as oil or fat. The solution used to slake the lime with alumina sul fate coinprisi'es about ninety per cent. of lime and ten per cent. of alumina .zilllfltlil, with the usual amount ol water-that is, so ill cient water to completely hydrate the CaQ. These freshly-precipitated bodies render the hydro- A1,,(SO4).,+-3(Ja(OlI),=Al (OIl) +30230,, but under no circumstances must sufficient alumina sulfate be used to convert all the calcium hydroxid into sulfate.

In carry ng out our process we take the fo1- lowing-steps: We first prepare an emulsion of oil or fat. We then add this to skimmed milk and heat to about to Fahrenheit, and then add an acid, such fiS'Slllflll'lG acid. The acid neutralizes the alkali and depositsthe oil or fat or their. acids in a minutely-subdivided state, after which the curd and whey are separated, and after drawing off the whey the mass of composition iswashed and dried. The curd compound thus obtained is further compounded with a solvent, such alkali or alkaline earths,which we treat or mix. with a suitable salt,- the salt having the property to fix the curd and the oily or fatty matter in the final drying of the paint or size. \Ve have'found that this is satisfactorily accomplished by theeuse of alumina sulfate. \Ve, therefore, combine burnt lime with alumina sulfate. \Veslake the lime or add asolution of alumina. sulfate thereto. A chemical action takes place then, and the lime GOIl'lf pound is thus made a fixing agent for the oily or fatty salts in combination with the curd, the two mixtures in the final product being, in about equal proportions. This composition may also be mixed with mineral matter, me

These l"ate-nt, is I 1. The herein-described composition consisting of milk albuminoid, oily substances, lime, alumina hydroxidand.calcium sulfate.

2. The herein-described composition con 5 sisting of milk albuminoids, oily or fatty sub stances emulsified, lime, alumina 'liydroxid and calcium sulfate. l

The herein-described composition con;

stances, lime, alumina hydroxid, calcium sulfate and a filler of mineral matter in a finelydivided state.

4. 'lheherein-described proeessforproducing' paints comprising the following steps: first emulsifying the oily or fatty substances, mixing it with skimmed milk, adding diluted acid to precipitate the casein and fatty substances, separating it from the whey, then washing the curd compound, then drying and pulverizing, thenmixing with the lime compound obtained by slaking the lime with the,

solution of alumina sulfate. 1

5. The herein-described process for-producing paints comprising the following steps:

first emulsifying the oily or fattysubstances, mixing it with skimmed milk, adding diluted acid to precipitate the casein andfatty substances, separating it from the whey, then washing the curd compound, then drying and pulverizing, then mixing with the lime com pound obtained by slaking the lime with the solution of alumina sulfate and adding mineral matter in its finely-divided state.

In Witness whereof we have hereunto set our hands on this (3th day of June, 1902.

SAMUEL S. RUSTON. BENJAMIN RUSTON. Witnesses: I

JESSIE M. HAMMEKEN, HOWARD P. DENISON. 

